Ultraviolet C (UVC) disinfection products utilize short-wavelength ultraviolet light (200–280 nm) to inactivate microorganisms (bacteria, viruses, fungi) by damaging their DNA/RNA, preventing replication. These products include fixed UVC lamps/fixtures (ceiling/wall-mounted for room air/surface disinfection), portable/handheld UVC devices, UVC robots, upper-room/air purification systems,...